EP0322623B1 - Dispersing and grinding apparatus - Google Patents

Dispersing and grinding apparatus Download PDF

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Publication number
EP0322623B1
EP0322623B1 EP88120727A EP88120727A EP0322623B1 EP 0322623 B1 EP0322623 B1 EP 0322623B1 EP 88120727 A EP88120727 A EP 88120727A EP 88120727 A EP88120727 A EP 88120727A EP 0322623 B1 EP0322623 B1 EP 0322623B1
Authority
EP
European Patent Office
Prior art keywords
rotor
vessel
dispersing
grinding
grinding apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88120727A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0322623A2 (en
EP0322623A3 (en
Inventor
Mitsuo Kamiwano
Yoshitaka Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoue Mfg Inc
Inoue Seisakusho Co Ltd
Original Assignee
Inoue Mfg Inc
Inoue Seisakusho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inoue Mfg Inc, Inoue Seisakusho Co Ltd filed Critical Inoue Mfg Inc
Publication of EP0322623A2 publication Critical patent/EP0322623A2/en
Publication of EP0322623A3 publication Critical patent/EP0322623A3/en
Application granted granted Critical
Publication of EP0322623B1 publication Critical patent/EP0322623B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type

Definitions

  • the invention relates to a dispersing and grinding apparatus according to the preamble of claim 1.
  • Guide members are provided on the rotor and on the inner wall of the vessel for guiding the flow of the mixture of material and grinding medium, which guide members are provided in the form of rows of individual protrusions in the form of cylindrical pins extending radially on the outer circumference of the rotor and on the inner circumference of the vessel.
  • FR-A 2 293 979 discloses a dispersing and grinding apparatus which is provided with protrusions in the form of a helix on the outer surface of the rotor and on the inner wall of the vessel. Both helixes are provided in a certain distance from each other to provide an angular flowpath therebetween. The helix has a forward and rearward guide surface for the mixture of material to be processed and grinding medium.
  • the protrusions provide a flow of the mixture in such a manner that the flow does not induce generation of a high velocity gradient, and makes the resulting mixture flow like a plug flow, the mixture may flow mainly in a circumferential direction,and thereby, sufficient motion can be provided to the grinding medium. Further, if the above flow is induced in the narrow space, uniform motion is provided to the grinding medium throughout the vessel, and accordingly, dispersing efficiency can be increased.
  • a grinding vessel 1 has an inlet 2 to supply material at one end thereof and has an outlet 3 to discharge the processed material at the other end. Towards the discharging outlet 3, a proper grinding medium separation unit is provided to separate a grinding medium 4 from the mixture.
  • a screen type separator 5 is used, but a gap type separator may also be utilized.
  • a jacket 6 is provided, and water or another medium for temperature control is introduced at an inlet 7 and issued through an outlet 8. The jacket may be provided within the vessel.
  • a rotor 10 is placed inside the vessel 1 defining a narrow space between itself and the inner wall 9.
  • the rotor 10 is attached to a shaft 11 which is connected with proper driving means (not illustrated) and rotates with rotation of the shaft.
  • the rotor is designed to be driven directly through the shaft extending to the outside of the vessel.
  • each of the guide members 12 has a pair of parallelogrammic forward guide surfaces 13 which give a forward movement to the mixture toward the outlet 3, and a pair of parallelogrammic rearward guide surfaces 14 which give a rearward movement to the mixture toward the supply inlet 2.
  • the guide member 12 may be made in various configurations. In the drawings almost parallelogrammic protrusions or preferably nearly diamond shaped protrusions are formed by cutting a right-handed screw and a left-handed screw to overlap one another on the outer circumference of the rotor.
  • the forward guide surfaces 13 and rearward guide surfaces 14 are formed on each side of the parallelogrammic protrusion, and further the forward guide surfaces are aligned in a spiral shape and the rearward guide surfaces are aligned in an spiral shape opposite to the forward guide surface on the outer periphery of the rotor.
  • the forward guide surfaces 13 and rearward guide surfaces 14 are separately disposed in the opposite state so that they can induce the flow of the grinding medium 4 which gathers around the discharge outlet or the supply inlet after abutting and contacting on each of the surfaces, to the opposite direction by movement to the opposite surfaces.
  • the above protrusions can also be formed on the vessel wall, which is made in one body by mechanical processing. Also, they can be formed by an investment casting or other casting process in one body. Thus, by disposing properly the protrusions with fine pitches, it is possible to let the mixture of the material and grinding medium flow in such a manner that a high velocity gradient in the axial direction does not occur, just like in a plug flow.
  • the grinding medium 4 such as glass, ceramic, alumina, zirconium, steel beads and others selected in accordance with the nature of the material to be treated and purposes of treatment, etc., is introduced into the supply inlet for the medium of which illustration is omitted, and is set almost equally along the axial direction of the rotor 10.
  • the mixture of grinding medium 4 and material is directed toward the discharge outlet 3 by striking on the forward guide surfaces 13 of the guide members 12, and next returns toward the supply inlet 2 by striking on the rearward guide surfaces 14.
  • the mixture consisting of grinding medium 4 and material striking on the rearward guide surfaces 14 is again directed toward the outlet 3 by striking the forward guide surfaces 13.
  • the material including grinding medium 4 is agitated and circulated in the various directions almost within the same limits in the axial direction of the rotor 10, and is maintained almost in a uniform state, and the flow thereof is similar to the flowing state in a plug flow. Therefore, the material entered from the inlet 2 into the vessel 1 with a proper forward pressure by means of a pump (not illustrated) is subjected to uniform shearing force by guide members and medium when it is moving along the circumference of the rotor 10, and, accordingly, it is dispersed efficiently and discharged from the outlet 3.
  • the mixture flows in a flowing state of the plug flow which has been proven by experiments in that the height of the above guide member 12 is about 4 mm, the space between the inner wall of the vessel and the protrusions is about 4 mm which distance corresponds to the size of about more than 4 particles of the grinding medium.
  • the rotor is designed as a cylinder.
  • the configuration of the rotor is not limited to the above. Other configurations may be utilized.
  • a plural number of rotors may be disposed parallel to each other within the vessel.
  • the vessel wall of the grinding vessel encircles the rotors 10, 10 so as to form the continuous grinding space around the rotors (see Fig. 4).
  • Fig. 5 is another embodiment in which a jacket is provided within a rotor.
  • a supply conduit 17 used to maintain temperature control with liquid such as cooling water etc is passed through a shaft 16 of a rotor 15.
  • the ends of the supply conduit 17 are connected with a passage 18 provided along the cylindrical wall of the rotor 15 and the passage 18 is also connected with an overflow vent 19 provided on the outer circumference of the supply conduit 17.
  • liquid such as cooling water etc enters the passage 18 through the supply conduit 17 wherein heat exchange operation is performed through the cylindrical wall, and is discharged through the overflow vent 19.
  • the surfaces of both ends of the rotor 15 are preferably designed with conical surfaces 20 so as to guide the mixture consisting of the material and grinding medium to the treatment space.
  • the mixture of the grinding medium and the material flows just as in the flowing state of the plug flow in the narrow space provided between the inner wall of the vessel and the rotor by means of the rotation of the rotor,and during such flowing sufficient shearing force is applied to the material by the grinding medium.
  • the mixture performs uniform dispersement through the entire area of the vessel and particle size distribution of the finished ground material becomes uniform.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
EP88120727A 1987-12-28 1988-12-12 Dispersing and grinding apparatus Expired - Lifetime EP0322623B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP329959/87 1987-12-28
JP62329959A JPH01171627A (ja) 1987-12-28 1987-12-28 湿式媒体分散機

Publications (3)

Publication Number Publication Date
EP0322623A2 EP0322623A2 (en) 1989-07-05
EP0322623A3 EP0322623A3 (en) 1990-05-23
EP0322623B1 true EP0322623B1 (en) 1995-03-15

Family

ID=18227179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120727A Expired - Lifetime EP0322623B1 (en) 1987-12-28 1988-12-12 Dispersing and grinding apparatus

Country Status (4)

Country Link
US (1) US4919347A (ja)
EP (1) EP0322623B1 (ja)
JP (1) JPH01171627A (ja)
DE (1) DE3853352T2 (ja)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0622662B2 (ja) * 1989-12-05 1994-03-30 株式会社井上製作所 媒体分散機
DE4113490A1 (de) * 1991-04-25 1992-10-29 Leipzig Lacke Gmbh Verfahren und vorrichtung zum zerkleinern, dispergieren, benetzen und mischen von pumpfaehigen, unmagnetischen mehrphasengemischen
JPH07106310B2 (ja) * 1991-12-13 1995-11-15 株式会社井上製作所 媒体分散機
JP2594213B2 (ja) * 1992-03-25 1997-03-26 株式会社奈良機械製作所 粒子状材料処理装置
US5852076A (en) * 1994-11-13 1998-12-22 Minnesota Mining And Manufacturing Company Process for preparing a dispersion of hard particles in solvent
EP0787035B1 (en) * 1994-11-14 2001-08-16 Minnesota Mining And Manufacturing Company Process and apparatus for preparing a dispersion of hard particles in solvent
DE69621352T2 (de) * 1996-11-22 2003-03-06 Toyo Ink Mfg Co Dispergiervorrichtung
US6325306B1 (en) 1997-10-22 2001-12-04 Material Recovery Of North America, Inc. Variable size reduction apparatus and process
JP4081785B2 (ja) 1999-07-29 2008-04-30 株式会社井上製作所 浸漬型分散機
JP4451965B2 (ja) 2000-05-18 2010-04-14 株式会社井上製作所 パイプラインビ−ズミル
US6976647B2 (en) 2001-06-05 2005-12-20 Elan Pharma International, Limited System and method for milling materials
ES2309177T3 (es) 2001-06-05 2008-12-16 Elan Pharma International Limited Sistema y metodo para moler materiales.
JP4648771B2 (ja) * 2005-06-20 2011-03-09 株式会社井上製作所 湿式媒体分散機
GB0516549D0 (en) 2005-08-12 2005-09-21 Sulaiman Brian Milling system
AU2007308838B2 (en) * 2006-10-25 2014-03-13 Revalesio Corporation Mixing device and output fluids of same
US8445546B2 (en) 2006-10-25 2013-05-21 Revalesio Corporation Electrokinetically-altered fluids comprising charge-stabilized gas-containing nanostructures
JP5144086B2 (ja) 2007-02-20 2013-02-13 独立行政法人物質・材料研究機構 分散または粉砕装置及び分散または粉砕方法
US9523090B2 (en) 2007-10-25 2016-12-20 Revalesio Corporation Compositions and methods for treating inflammation
US9745567B2 (en) 2008-04-28 2017-08-29 Revalesio Corporation Compositions and methods for treating multiple sclerosis
US10125359B2 (en) 2007-10-25 2018-11-13 Revalesio Corporation Compositions and methods for treating inflammation
CN102814217A (zh) * 2012-08-31 2012-12-12 常州市龙鑫化工机械有限公司 一种高效再循环珠磨机
JP6262980B2 (ja) * 2013-10-07 2018-01-17 日本コークス工業株式会社 メディア撹拌型湿式粉砕機
DE102015105804A1 (de) * 2015-04-16 2016-10-20 Netzsch-Feinmahltechnik Gmbh Rührwerkskugelmühle

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206207A2 (de) * 1985-06-18 1986-12-30 Erich Netzsch GmbH & Co. Holding KG Rührwerksmühle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822987A (en) * 1955-06-28 1958-02-11 David J Uhle Apparatus for grinding solid material
US3199792A (en) * 1962-07-20 1965-08-10 Jr Robert W Norris Comminuting and dispersing process and apparatus
CH566167A5 (ja) * 1973-09-28 1975-09-15 Bicik Vladislav
DE7431142U (de) * 1974-09-16 1974-12-12 Designa Gmbh Vielflachkoerper
DE2458841C2 (de) * 1974-12-12 1985-03-14 Draiswerke Gmbh, 6800 Mannheim Rührwerksmühle
US4206879A (en) * 1978-08-10 1980-06-10 Gebrueder Buehler Ag Agitator mill
DE3106062A1 (de) * 1981-02-19 1982-09-09 Draiswerke Gmbh, 6800 Mannheim Ruehrwerksmuehle
JPS59176651U (ja) * 1983-05-16 1984-11-26 三井三池化工機株式会社 横型乾式メデイヤ型粉砕混合機
DE3440993A1 (de) * 1984-11-09 1986-05-22 Omya GmbH, 5000 Köln Ruehrwerksmuehle, insbesondere ruehrwerkskugelmuehle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206207A2 (de) * 1985-06-18 1986-12-30 Erich Netzsch GmbH & Co. Holding KG Rührwerksmühle

Also Published As

Publication number Publication date
US4919347A (en) 1990-04-24
EP0322623A2 (en) 1989-07-05
JPH0470050B2 (ja) 1992-11-09
JPH01171627A (ja) 1989-07-06
DE3853352T2 (de) 1995-07-27
DE3853352D1 (de) 1995-04-20
EP0322623A3 (en) 1990-05-23

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